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 # Copyright (c) 2015-21, NVIDIA CORPORATION. All rights reserved.
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 # modification, are permitted provided that the following conditions
 # are met:
 #  * Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 #  * Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #  * Neither the name of NVIDIA CORPORATION nor the names of its
 #    contributors may be used to endorse or promote products derived
 #    from this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS" AND ANY
 # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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 # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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#include "stdafx.h"
#include "ParameterBlock.h"

namespace Falcor
{
    ParameterBlock::SharedPtr ParameterBlock::create(const std::shared_ptr<const ProgramVersion>& pProgramVersion, const ReflectionType::SharedConstPtr& pElementType)
    {
        if (!pElementType) throw ArgumentError("Can't create a parameter block without type information");
        auto pReflection = ParameterBlockReflection::create(pProgramVersion.get(), pElementType);
        return create(pReflection);
    }

    ParameterBlock::SharedPtr ParameterBlock::create(const ParameterBlockReflection::SharedConstPtr& pReflection)
    {
        assert(pReflection);
        return SharedPtr(new ParameterBlock(pReflection->getProgramVersion(), pReflection));
    }

    ParameterBlock::SharedPtr ParameterBlock::create(const std::shared_ptr<const ProgramVersion>& pProgramVersion, const std::string& typeName)
    {
        assert(pProgramVersion);
        return ParameterBlock::create(pProgramVersion, pProgramVersion->getReflector()->findType(typeName));
    }

    ShaderVar ParameterBlock::getRootVar() const
    {
        return ShaderVar(const_cast<ParameterBlock*>(this));
    }

    ShaderVar ParameterBlock::findMember(const std::string& varName) const
    {
        return getRootVar().findMember(varName);
    }

    ShaderVar ParameterBlock::findMember(uint32_t index) const
    {
        return getRootVar().findMember(index);
    }

    size_t ParameterBlock::getElementSize() const
    {
        return mpReflector->getElementType()->getByteSize();
    }

    UniformShaderVarOffset ParameterBlock::getVariableOffset(const std::string& varName) const
    {
        return getElementType()->getZeroOffset()[varName];
    }

    void ParameterBlock::renderUI(Gui::Widgets& widget)
    {
        VariablesBufferUI variablesBufferUI(*this);
        variablesBufferUI.renderUI(widget);
    }
}
